Re: Use of register keyword for Globals

[LIU Hao via Gcc]

在 2025-5-23 23:03, Joel Sherrill via Gcc 写道:

Hi

In the SPARC port of RTEMS, there is a global variable assigned to a
register for performance reasons. This is the near decade old line of code:

register struct Per_CPU_Control *_SPARC_Per_CPU_current __asm__( "g6" );

+1 for this.



   register struct _TEB *__mingw_current_teb __asm__("x18");





--
Best regards,
LIU Hao

On ARM64, Windows uses X18 as a pointer to thread-specific data. We have this declaration which we can't get rid of:

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